The oversharpening fix works fine but you need to turn off and on the screen once, only the first time though.

4. Why there is no 4G/LTE option in settings?

Try removing LteConfigs folder from /system/app with a root explorer, then reboot.

5. I've changed my DPI to a lower one and some apps are not working or I get bootloop, why?

If you get a bootloop make sure you wipe cache/dalvik too. If you experience apps not working, that's because some LG apps do not support such DPIs, so just revert it to a higher one.

6. Xposed doesn't work, what can I do?

Xposed is reported to be working from v78, anyway all Xposed related questions must be asked in the proper thread. All questions about it will be ignored.
You might also installed wrong version: our platform is ARM, sdk is 23 for Marshmallow.

7. I have issues with beta variants, what can I do?

Take a look here on how to fix common issues. To report these issues visit port thread.

8. Why doesn't LG Browser exist anymore from version 5.0?

Because LG removed it in UX 5.0.

9. Why am I getting Contacts FC?

Make sure you full wiped your phone if coming from version 4.x or other Roms. If still FCs do not import or restore contacts data from any backup (eg. LG backup).

10. I'm on Verizon VS985 variant and my 4G isn't working, what should I do?